Mng giúp mk bài này vs ----- Nội dung dịch tự động từ ảnh ----- Ex2: Rewrite the following sentences using "used to". (Viết lại câu sử dung "used to" 1. There was a secondary school here in the 1900s. 2. We didn't get up early to catch the bus several years ago. 3. He didn't know how to study English online, but now he can study well. 4. We often played hide and seek when we were children.